10
RefRIgeRAnT pIpIng
Wet rag heat sink
Shield
Line Sizing
1.
Size lines per Table 7, Page 36
.
2.
Match suction line size with condenser service valve
connection.
• When matching WlHv18 or 24 with 18,000 or
24,000-Btuh condenser, use 5/8" suction line, with
reducer installed at indoor connection.
Refrigerant piping
1.
Clean ends of tubing and insert into fittings. See
Figure 8.
2.
Protect valves by wrapping with a wet rag “heat sink”
before brazing. See Figure 9.
3.
Use a shield to protect the paint as shown in Figure 9.
(The shield can be made from scrap metal.)
4.
Braze tubing into fittings.
5.
Install all panels removed to this point. Panels are
required for proper air flow.
6.
Both lines of line set must be insulated entire length
with closed cell, foam tube insulation.
7.
Connect outdoor unit according to instructions supplied
with unit.
8.
All horizontal piping runs must be level or sloped
towards compressor without dips to trap oil.
figure 8 - Clean ends Of Tubing
figure 9 - place Wet Rag “Heat Sink" Over
Valves plus A Sheet Metal Shield To
protect paint
nOTICe
Pressure test all field installed piping with nitrogen.
Using suitable vacuum pump, evacuate tubing and
indoor unit to 500 microns or less, with service
valves remaining front seated (closed
).
